HYDRAULICS 1.69 AUXILIARY HYDRAULIC PUMP (6) Removal NOTE: The auxiliary hydraulic pump is located in the engine compartment, attached to the timing case. Remove components as necessary to get access to the pump. 1. Stop the engine and chock the machine, apply the parking brake . 2. Refer to page 1.1 and dump hydraulic pressure then disconnect the battery. 3. Make sure the pump is free from dirt to avoid contamination of the hydraulic system. 4. Remove the inlet hose (2) from the pump (1). 1. Auxiliary pump 2. Inlet hose 3. Outlet hose 4. Timing case 5. Remove the outlet hose (3) from the pump (1). 6.
Remove the five cap screws and washers securing the pump to the timing case (4) and remove the pump. 7. Fit blanks to all openings on the pump and hoses to prevent the ingress of dirt. 8. When a new pump is to be installed, remove the nut (6) and washer (7) securing the drive gear (8) to the pump shaft. Remove the drive gear and woodruff key from the shaft. Installation 1. Installation is the reverse of removal. 2. Use new washers (9) on the cap screws (10) when assembling the inlet and outlet hoses. 3. Use a new gasket (5) between the pump and timing case when installing the pump. 4. Refer to page 1.66, check the hydraulic level and replenish if necessary before the engine is started. 5.
Purge the hydraulic system by starting the engine and operating all services to fully extend and retract cylinders several times. 5. Gasket 6. Nut 7. Washer 8. Gear 9. Washer 10. Cap screw 6. Check the hydraulic level and refer to Page 1.66 and replenish if necessary.